Alright, let's work through 87305743 times 20977959 step by step
87305743 × 20977959 = 20977959 × (87305743)
+ 20977959 × 3 what gives us 62933877
+ 20977959 × 40 yielding 839118360
+ 20977959 × 700 that results in 14684571300
+ 20977959 × 5000 that is equal 104889795000
+ 20977959 × 00000 giving us 0
+ 20977959 × 300000 resulting in 6293387700000
+ 20977959 × 7000000 yielding 146845713000000
+ 20977959 × 80000000 yielding 1678236720000000

= 1831496297118537
